Linux（CentOS）下安裝tesseract-ocr以及配置依賴leptonica

下載

wget https://github.com/tesseract-ocr/tesseract/archive/4.1.0.tar.gz
wget http://www.leptonica.org/source/leptonica-1.74.4.tar.gz

安裝依賴：yum install autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel zlib-devel

安裝leptonica

tar -xzvf leptonica-1.74.4.tar.gz
cd leptonica-1.74.4.tar.gz
./configure --profix=/usr/local/leptonica
make
sudo make install

不少其餘教程到這一步就直接開始安裝 tesseract，實際上若是你照着教程走的話，再 configure 的時候就會報錯：找不到 leptonica。因此咱們要先配置一下 leptonica 的環境變量。

打開 /etc/profile

vim /etc/profile

添加如下字段

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/leptonica/lib/pkgconfig
export PKG_CONFIG_PATH
CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH:/usr/local/leptonica/include/leptonica
export CPLUS_INCLUDE_PATH
C_INCLUDE_PATH=$C_INCLUDE_PATH:/usr/local/leptonica/include/leptonica
export C_INCLUDE_PATH
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/leptonica/lib
export LD_LIBRARY_PATH
LIBRARY_PATH=$LIBRARY_PATH:/usr/local/leptonica/lib
export LIBRARY_PATH
LIBLEPT_HEADERSDIR=/usr/local/leptonica/include/leptonica
export LIBLEPT_HEADERSDIR

應用配置

source /etc/profile

OK，如今咱們就能夠開始安裝 tesseract。

安裝 tesseract

tar -xzvf 4.1.0.tar.gz
cd tesseract-4.1.0
./configure --profix=/usr/local/tesseract
make
sudo make install

接下來配置 tesseract 環境變量

打開 /etc/profile

vim /etc/profile

追加如下字段

PATH=$PATH:/usr/local/tesseract/bin
export PATH

應用配置

source /etc/profile

測試一下：

tesseract -v

輸出：

tesseract 4.1.0
 leptonica-1.74.4
  libjpeg 6b (libjpeg-turbo 1.2.90) : libpng 1.5.13 : libtiff 4.0.3 : zlib 1.2.7

 Found AVX2
 Found AVX
 Found SSE

OK，到這裏，咱們就安裝成功了，你的安裝成功了嗎？有任何問題評論告訴我吧！